/**
*
*   CSS document
*   Created by 紫相 on 2018/5/15.
*
**/
body{
  overflow: auto;
}
#main{
  width: 100%;
  height: 100%;
}
#loading div{
  width: 100%;
  height: 50%;
  background-color: #009ce0;
  position: absolute;
  z-index: 50;
  transition: 2s;
}
#loading div:nth-child(1){
  top: 0;
}
#loading div:nth-child(2){
  bottom: 0;
}
#loading span{
  width: 0%;
  height: 4px;
  display: block;
  position: absolute;
  left: 0;
  top: 50%;
  margin-top: -2px;
  z-index: 51;
  background-color: #ffffff;
  transition: 0.5s;
}